Assessment of mechanical properties of steel fiber reinforced mortar mixtures containing lightweight aggregates improved by bacteria

Yazıcı, Şemsi; Ayekin, Burcu; Mardani‐Aghabaglou, Ali; Güller, Canberk

doi:10.1080/21650373.2021.2021560

Cited by 8 publications

(1 citation statement)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, according to the literature, the mechanical properties of the concrete mixtures significantly decrease owing to the RCA surface imperfections (Evangelista and de Brito, 2007; Kou and Poon, 2012; Poon et al, 2004a, 2004b). These defects are thought to be effectively repaired using bacteria-based remediation (Singh et al, 2018; Wang et al, 2017; Yazici et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Usability of sustainable materials on bacteria-based self-healing in cementitious systems

Yazıcı

Güller

Ayekin

et al. 2023

Journal of Intelligent Material Systems and Structures

Self Cite

View full text Add to dashboard Cite

Damage and loss of strength resulting from deterioration in concrete structures are extremely expensive and time-consuming processes that require improvement. Therefore, special concrete demand to respond to crack formation with its self-healing action leads to microbial concrete research and development. In this study, the effects of bacterial utilization on both mechanical/physical properties of the recycled concrete aggregates (RCA) containing mortar mixtures and the crack-healing were investigated. Bacillus subtilis bacteria were cultivated on three different nutrient media, Tryptic Soy Broth, Modify Luria-Bertani, and urea-calcium phosphate, and then encapsulated in RCA with these nutrient media. Twenty-one different mortar mixtures were prepared by partially replacement of bacterial RCA with the limestone one. The compressive and flexural strengths as well as ultrasonic pulse velocity of mortar mixtures were determined. Also, physical properties of the mortar mixtures such water absorption, capillarity and total void ratio were obtained. It was observed that the physical and mechanical properties of the mortar mixtures containing less than 30% RCA are significantly healed by CaCO3 precipitated by bacteria. The results showed that that urea and Ca2+ in the nutrient media increase the CaCO3 precipitation efficiency of bacteria, but glucose in the media causes foaming in the mixtures and creates a hollow structure. The study also indicated that microorganisms had a positive role not only in the concrete strength increasing but also in facilitating the self-healing of cracks. It was observed that the cracks formed up to 0.3 mm in the bacterial mortar mixtures were mostly closed in 7 days.

show abstract

Section: Introductionmentioning

confidence: 99%

Usability of sustainable materials on bacteria-based self-healing in cementitious systems

Yazıcı

Güller

Ayekin

et al. 2023

Journal of Intelligent Material Systems and Structures

Self Cite

View full text Add to dashboard Cite

show abstract

Effect of fiber type, size, and utilization rate on mechanical and thermal properties of lightweight concrete facade panels

Beytekin,

Kaya,

Mardani

et al. 2024

Structural Concrete

View full text Add to dashboard Cite

It was understood that various studies were carried out on the strength, permeability, durability, increasing the thermal performance of lightweight concrete facade panels, and sustainable and energy‐efficient concepts. It was observed that fiber was added to the mixture to improve the properties in question. However, it was determined that contradictory results were obtained due to the large number of active parameters and whether the fiber was distributed homogeneously in the matrix. In this study, the effects of fiber type, length and usage rate on the strength, energy absorption capacity, elasticity modulus, water absorption, and thermal performance of lightweight concrete mixtures were investigated. For this purpose, three different types of fibers of different lengths: polypropylene (3, 6, and 12 mm), glass (13 and 25 mm) and polyamide (6 and 12 mm) were used at 0%, 0.25%, 0.50%, and 0.75% of the total volume. It was determined that the mixture containing 0.25% polypropylene fiber with a length of 3 mm exhibited the best performance in terms of both mechanical and thermal properties. In terms of these features, it was understood that the mixtures with 12 mm polypropylene with a usage rate of 0.75% and 6 mm polyamide fibers with a usage rate of 0.50% had the weakest performance.

show abstract

A review on the mechanical performance and durability of fiber reinforced lightweight concrete

Liao,

Zhao,

et al. 2024

Journal of Building Engineering

View full text Add to dashboard Cite

Assessment of mechanical properties of steel fiber reinforced mortar mixtures containing lightweight aggregates improved by bacteria

Cited by 8 publications

References 55 publications

Usability of sustainable materials on bacteria-based self-healing in cementitious systems

Usability of sustainable materials on bacteria-based self-healing in cementitious systems

Effect of fiber type, size, and utilization rate on mechanical and thermal properties of lightweight concrete facade panels

A review on the mechanical performance and durability of fiber reinforced lightweight concrete

Contact Info

Product

Resources

About